A measurement of the semileptonic branching ratio BR(b-baryon → plv̄X) and a study of inclusive π±, K±, (p, p̄) production in Z decays
Inclusive π±, K± and (p, p̄) production is investigated using data recorded by the ALEPH detector between 1992 and 1994. The momentum spectra and multiplicities are measured separately in Z → bb̄, Z → cc̄ and Z → uū, dd̄, ss̄ decays. The number of protons found in b-hadron decays is used to estimate...
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| Main Authors: | , |
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| Format: | text |
| Language: | English |
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Institutional Knowledge at Singapore Management University
1998
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| Online Access: | https://ink.library.smu.edu.sg/sis_research/5841 |
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| Institution: | Singapore Management University |
| Language: | English |
| Summary: | Inclusive π±, K± and (p, p̄) production is investigated using data recorded by the ALEPH detector between 1992 and 1994. The momentum spectra and multiplicities are measured separately in Z → bb̄, Z → cc̄ and Z → uū, dd̄, ss̄ decays. The number of protons found in b-hadron decays is used to estimate the fraction of b-baryons in b events to be (10.2 ± 0.7 ± 2.7)% assuming BR(b-baryon→ pX) = (58 ± 6)%. From an additional study of proton-lepton correlations in b events, the branching ratio BR(b-baryon → plv̄X) = (4.63 ± 0.72 ± 0.98)% is obtained. The ratio BR(b-baryon → plv̄X)/BR(b-baryon → pX) is found to be 0.080 ± 0.012 ± 0.014. |
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